linux-kernel - [PATCH v5 2/4] clk: zynqmp: Use firmware specific divider clock flags

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Date:   Thu, 24 Jun 2021 05:16:31 -0700
From:   Rajan Vaja <rajan.vaja@...inx.com>
To:     <mturquette@...libre.com>, <sboyd@...nel.org>,
        <michal.simek@...inx.com>, <lee.jones@...aro.org>,
        <kristo@...nel.org>, <quanyang.wang@...driver.com>
CC:     <linux-clk@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, Rajan Vaja <rajan.vaja@...inx.com>
Subject: [PATCH v5 2/4] clk: zynqmp: Use firmware specific divider clock flags

Use ZynqMP specific divider clock flags instead of using CCF flags.

Signed-off-by: Rajan Vaja <rajan.vaja@...inx.com>
---
 drivers/clk/zynqmp/clk-zynqmp.h |  9 +++++++++
 drivers/clk/zynqmp/divider.c    | 25 ++++++++++++++++++++++++-
 2 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/zynqmp/clk-zynqmp.h b/drivers/clk/zynqmp/clk-zynqmp.h
index 974d3dae35a7..9b2ff35ee136 100644
--- a/drivers/clk/zynqmp/clk-zynqmp.h
+++ b/drivers/clk/zynqmp/clk-zynqmp.h
@@ -32,6 +32,15 @@
 /* do not gate, ever */
 #define ZYNQMP_CLK_IS_CRITICAL		BIT(11)
 
+/* Type Flags for divider clock */
+#define ZYNQMP_CLK_DIVIDER_ONE_BASED		BIT(0)
+#define ZYNQMP_CLK_DIVIDER_POWER_OF_TWO		BIT(1)
+#define ZYNQMP_CLK_DIVIDER_ALLOW_ZERO		BIT(2)
+#define ZYNQMP_CLK_DIVIDER_HIWORD_MASK		BIT(3)
+#define ZYNQMP_CLK_DIVIDER_ROUND_CLOSEST	BIT(4)
+#define ZYNQMP_CLK_DIVIDER_READ_ONLY		BIT(5)
+#define ZYNQMP_CLK_DIVIDER_MAX_AT_ZERO		BIT(6)
+
 enum topology_type {
 	TYPE_INVALID,
 	TYPE_MUX,
diff --git a/drivers/clk/zynqmp/divider.c b/drivers/clk/zynqmp/divider.c
index 0becdc0a8bff..c07423e03bc8 100644
--- a/drivers/clk/zynqmp/divider.c
+++ b/drivers/clk/zynqmp/divider.c
@@ -284,6 +284,29 @@ static u32 zynqmp_clk_get_max_divisor(u32 clk_id, u32 type)
 	return ret_payload[1];
 }
 
+static inline unsigned long zynqmp_clk_map_divider_ccf_flags(
+					       const u32 zynqmp_type_flag)
+{
+	unsigned long ccf_flag = 0;
+
+	if (zynqmp_type_flag & ZYNQMP_CLK_DIVIDER_ONE_BASED)
+		ccf_flag |= CLK_DIVIDER_ONE_BASED;
+	if (zynqmp_type_flag & ZYNQMP_CLK_DIVIDER_POWER_OF_TWO)
+		ccf_flag |= CLK_DIVIDER_POWER_OF_TWO;
+	if (zynqmp_type_flag & ZYNQMP_CLK_DIVIDER_ALLOW_ZERO)
+		ccf_flag |= CLK_DIVIDER_ALLOW_ZERO;
+	if (zynqmp_type_flag & ZYNQMP_CLK_DIVIDER_POWER_OF_TWO)
+		ccf_flag |= CLK_DIVIDER_HIWORD_MASK;
+	if (zynqmp_type_flag & ZYNQMP_CLK_DIVIDER_ROUND_CLOSEST)
+		ccf_flag |= CLK_DIVIDER_ROUND_CLOSEST;
+	if (zynqmp_type_flag & ZYNQMP_CLK_DIVIDER_READ_ONLY)
+		ccf_flag |= CLK_DIVIDER_READ_ONLY;
+	if (zynqmp_type_flag & ZYNQMP_CLK_DIVIDER_MAX_AT_ZERO)
+		ccf_flag |= CLK_DIVIDER_MAX_AT_ZERO;
+
+	return ccf_flag;
+}
+
 /**
  * zynqmp_clk_register_divider() - Register a divider clock
  * @name:		Name of this clock
@@ -321,7 +344,7 @@ struct clk_hw *zynqmp_clk_register_divider(const char *name,
 	/* struct clk_divider assignments */
 	div->is_frac = !!((nodes->flag & CLK_FRAC) |
 			  (nodes->custom_type_flag & CUSTOM_FLAG_CLK_FRAC));
-	div->flags = nodes->type_flag;
+	div->flags = zynqmp_clk_map_divider_ccf_flags(nodes->type_flag);
 	div->hw.init = &init;
 	div->clk_id = clk_id;
 	div->div_type = nodes->type;
-- 
2.32.0.93.g670b81a